CVE-2026-43221 (GCVE-0-2026-43221)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:20
VLAI?
Title
ipmi: ipmb: initialise event handler read bytes
Summary
In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: initialise event handler read bytes IPMB doesn't use i2c reads, but the handler needs to set a value. Otherwise an i2c read will return an uninitialised value from the bus driver.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 63c4eb347164845b380089012fe43992511c0ad3 , < 905554ebd76aeee370bfd5136ea11e0b9d75c6f1 (git)
Affected: 63c4eb347164845b380089012fe43992511c0ad3 , < 56d5c0557e53c4d8d92a619fa83eaae178165e07 (git)
Affected: 63c4eb347164845b380089012fe43992511c0ad3 , < 2dfbc8c17dd161885336e77e71c336cd62cf6748 (git)
Affected: 63c4eb347164845b380089012fe43992511c0ad3 , < f726b3a57e00bb6249c67714c11ae8b4b31719a1 (git)
Affected: 63c4eb347164845b380089012fe43992511c0ad3 , < 102712417bb6aa9a00d852bc59cb0a276db486c4 (git)
Affected: 63c4eb347164845b380089012fe43992511c0ad3 , < 9f235ccecd03c436cb1683eac16b12f119e54aa9 (git)
Create a notification for this product.
Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/ipmi/ipmi_ipmb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "905554ebd76aeee370bfd5136ea11e0b9d75c6f1",
              "status": "affected",
              "version": "63c4eb347164845b380089012fe43992511c0ad3",
              "versionType": "git"
            },
            {
              "lessThan": "56d5c0557e53c4d8d92a619fa83eaae178165e07",
              "status": "affected",
              "version": "63c4eb347164845b380089012fe43992511c0ad3",
              "versionType": "git"
            },
            {
              "lessThan": "2dfbc8c17dd161885336e77e71c336cd62cf6748",
              "status": "affected",
              "version": "63c4eb347164845b380089012fe43992511c0ad3",
              "versionType": "git"
            },
            {
              "lessThan": "f726b3a57e00bb6249c67714c11ae8b4b31719a1",
              "status": "affected",
              "version": "63c4eb347164845b380089012fe43992511c0ad3",
              "versionType": "git"
            },
            {
              "lessThan": "102712417bb6aa9a00d852bc59cb0a276db486c4",
              "status": "affected",
              "version": "63c4eb347164845b380089012fe43992511c0ad3",
              "versionType": "git"
            },
            {
              "lessThan": "9f235ccecd03c436cb1683eac16b12f119e54aa9",
              "status": "affected",
              "version": "63c4eb347164845b380089012fe43992511c0ad3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/ipmi/ipmi_ipmb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: ipmb: initialise event handler read bytes\n\nIPMB doesn\u0027t use i2c reads, but the handler needs to set a value.\nOtherwise an i2c read will return an uninitialised value from the bus\ndriver."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:20:20.815Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07"
        },
        {
          "url": "https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748"
        },
        {
          "url": "https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9"
        }
      ],
      "title": "ipmi: ipmb: initialise event handler read bytes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43221",
    "datePublished": "2026-05-06T11:28:21.579Z",
    "dateReserved": "2026-05-01T14:12:55.994Z",
    "dateUpdated": "2026-05-11T22:20:20.815Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43221",
      "date": "2026-05-22",
      "epss": "0.00013",
      "percentile": "0.02436"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43221\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T12:16:41.780\",\"lastModified\":\"2026-05-12T19:09:12.717\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipmi: ipmb: initialise event handler read bytes\\n\\nIPMB doesn\u0027t use i2c reads, but the handler needs to set a value.\\nOtherwise an i2c read will return an uninitialised value from the bus\\ndriver.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.165\",\"matchCriteriaId\":\"797C7F46-D0BE-4FB8-A502-C5EF8E6B6654\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.128\",\"matchCriteriaId\":\"851E9353-6C09-4CC9-877E-E09DB164A3C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.75\",\"matchCriteriaId\":\"BCE16369-98ED-41CF-8995-DFDC10B288D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.16\",\"matchCriteriaId\":\"B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.6\",\"matchCriteriaId\":\"373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"F253B622-8837-4245-BCE5-A7BF8FC76A16\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.